Omron NT631C manual RS-485 Direct 11 connection, 1N connection

Method for Connection to the Host

Section 2-1

Communica-

Communica-

Usable Connection Method

Usable Communications

Details

tions Type at

tions Type at

Method

PT

Host

Host

NT

NT

Mem-

link

Link

Link

ory

(1:1)

(1:N)

link

RS-485

RS-232C

1:1 connection via a convertor unit

⋅

⋅

❍

⋅

page 82

PT

Convertor unit

Host

(NT-AL001)

RS-485

RS-232C

(max. 500 m)

(max. 2 m)

1:N connection via a convertor unit

⋅

⋅

❍

⋅

page 86

PT

Convertor unit

Host

(NT-AL001)

RS-485

RS-232C

(total length 500 m) (max. 2 m)

RS-485

Direct 1:1 connection

⋅

⋅

❍

⋅

page 118

PT

Host

RS-485 (max. 500 m)

1:N connection

⋅

⋅

❍

⋅

page 121

PT

Host

RS-485 (total length 500 m)

❍: Connection possible ⋅: Connection not possible

•The RS-232C/RS-422A adapter (NT-AL001) requires +5 V, 150 mA at pin 6 of the RS-232C connector. Check the signals of the RS-232C connector at the host.

•+5 V is not output from serial port B of the NT631/NT631C. When con- necting an NT-AL001 at serial port B, a separate power supply is required for the NT-AL001.

•The cable of an NT-AL001 cannot be connected or disconnected while the power is ON. Always connect or disconnect the cable while the power supply from the RS-232C cable is OFF (while the host power supply is OFF).

•NT Link (1:N) connection is possible even when RS-232C is used at the NT631/NT631C side for communications with the host, but in this case one NT-AL001 Adapter is required for each NT631/NT631C. In this case, it is convenient to use serial port A of the NT631/NT631C. +5 V is not out- put from serial port B.

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